Illuminating device



ay 17 E. B. MABEE ILLUMINATING DEVICE Filed March 18, 1924 i PatentedMay 17, r1927.

4imitan STATES PATENT oF ELLIOTT B. iviAiagor BROOKLYN, NEW YoRK.

My invention relates to illuminating 'de-V particularly adapted fordental uses.

vices which are medical and i .Application ilediMrarch 18, 1924; SerialNo. 699,985.

Its object is the product-ion of a novel type of lamp which comprises inone structure means vor either concentrating its light in parallel rays,vthat is, .a spot light, or directing the same in evenly diffused 'wideangle rays, of `the whole power create-aflood oiiopenliglit. I l

of the invention is to Anothery object or permitting the employment ofAthe light. lsource to permit the ready employment or adjustment ofeither oi" these means by a simple manipulation of one or two Anotherobject of elements of my device.

the invention is to prevent the emergence of the light from any part ofthe device except where intended.

This is accomplished the ends of the hemis i'nafter described.

Another object of low instant access to for chang-e or replacemecleansing of parts, or

Other objects by the overlapping of pherical members herethe inventionis to al-` part of' my dev-icev any nt of light source,

for any other purpose.

and-advantages will appear from the following detailed description andthe accompanying drawings forming part hereof.

My improved structure made of metal, and

, as shown, comprises a reilector member in which'the light source ispositioned in any s stantially uitable way. Two subsimilar elements,larger in circumterence than the reflector member, are arrangedtobe'independently rotatable over the same. One of a diffusing materialglass, and the other whole is mounted on by which it may be p these isadapted to receive preferably prisinatic a' lens system. The a bracketor floor sta-nd laced wherever desired.

' tional view of another for the lens system.

form of mounting Similar reference characters refer to'correspondingparts.

The bracket arm by which the lamp is supported is designated yby thenumeral 1,

or the device may be supported by socket 9.

rIhe bracket arm may be oit' any desired form so long as it does notimpede the movement of 'the diffused members. bolts 2. On these b glassald lens-bearing In the ends ot the .bracket arer olts .are situatedmemyis preferably lin construction, and has the bers 3, 4 and ablystat-ionar andis located on the'v inner ends vof thefb'olts, andintermediate said sta. tionary mem-ber and the ends of the bracket, aremounted movable members 4 and 5. Each ofthese is substantiallyhemispherical in form. Nuts 6, 7 place, and' spring washers 19 and 2Oserve to exert the tension needed to;y maintain members 4 and" 5 intheir relative positions.

The member 3 .acts as a reilector, and'is apertured to receive socket 9and electric lamp 10. To hold the socket and' lamp in placethe wallotrmember 3 may be turned ini'vard as at 11, with which and 8 holdthemin inturned part 5. The memberB is'prefery split ring 12co-`operates for the purpose prismatic glass or light-diffusing material13, the parts 414, in conjunction lwith encircling wire l5 co-acting tohold the said glass in place in any position of the membe`r`4.

The member 5 isv extendedk at itsicentre into a tubular portion 16 inwhich lare 1o-y cated one or more 'lenses 17.y and 18.'V These lensesmay be mounted in anywaydes'ired, and not necessarily directly andremovably attached to member 16. In i stance, I have illustrated a-mounting de vised by me which issimple and economical 'advantage v'ofpermitting i both lenses l to be removed through the ou'ter'e'nd ofextension'lt. .This mounting consists of a sleeve y24 provided at oneend with aslight flange 25 to engage i the circumference of member 16. Athread'-V ed retaining cap 26 acts both to hold lens 18 and asv aclosure for the outer end of member 16, the latter being also threadedtoene. gage thel threadsv otfs'aid retaining cap.- 'In the oppositenarrowed end of the sleeve 24 an inside bushing; 27, externallythreaded, engages with lens-retaining ring 28, which is internallythreaded, to hold lens 17 in po-l sition between them. i l y y 21 is a'`removable key,k which extends through slot 22 in member 5 intoanopening' in member '4 provided for it, and 23a knob on member 5, forthe purpose ot' rotating the said members 4 and as hereinafterdescribed. v l n Y Y n lIn the practical employment offmyjdevice iti's'operated4 asfollows. Assuming the Fig. 3, forfini knected yto asource of supply,

light will then be taken up by i tures.

lamp, with its associated parts, to be in the position shown in thedrawings, and `iconand that the moment cills for the particular need ofthe parallel rays,

concentration of the light in the operator takes hold of key 2l andiotates L 'over and back of, or partially' back of, member 3. The lightfrom l() now flows in an unimpeded stream to the properly focused lenssystem ininember 1G, by which itiscoll-ected and concentrated into thecomparatively small areaof a spot light.

Where a wider area of evenly diffused light is required, the member i ismoved into. its former position, lkey 2l withdrawn fronrthe path ofmember Vi, and the latter rotated back out of the light focus. The

li ghtv-diffusin the well ing vmaterial known way. f K

Should it be desired to utilize all the light at the .command `of theoperator directly, both members 4 and 5 are rotated out of the Way, andthe full power of the light source employed in a flood or open light.

From the foregoing it will be seen have devised a simple yand compactdevice for effectively controlling the shaftl of light and readilyincreasing or decreasing itsdiameter. Furthermore, that my illuminatingdevice possesses a number of novel fea- It gives a spot light, adiffused light, and a glare light. It is constructed to prevent thelight from coming out except where intended. The simplicity of itsY construction issuch that it permits ready adjustment for the employment vofany of the above forms of lightby a simple manipulation of one or twoelements. My new structure is so 'designed thatit need never be takenapart, as by merely rotating members t and 5 over and back of thereflector 3, the lamp becomes accessible. Nevertheless the device isveasily assembled and taken apart. It is'olear also 'that when members4; and 5 are rotated over and baclr of member 3, the lamp can be easilyremoved and replaced through the opening thus 'formed between members 41and 5 and member 3. This is a very valuable feature of my device. lt

13 and di if used i.

- makes it possible to remove and renew the lamp -`without .disturbingor disarranging any otherV part of the construction, and makes the`device a substantiallyV unitary structure. y

My improved Vmounting` for y the lenses illustrated in Fig. 3 alsopermits easy access to the same, as by simply unscrewing .retain` ingcap 26 the` sleeve Q4 can bey withdrawn bodily with the lens 17l and itsassociated parts.

It will be evident that various changes may be made in the constructionof my device without sacrificing its advantages.` The type which I haveillustrated and described fusing. section would be more herein isadapted to meet more especially the f needs of the dental profession.

For the. use of physicians generally a lamp which dispensed with memberle and its dif- 1 appropriate. In such a lamp it is absolutely necessaryto keep the light surrounded so as to prevent its emergence from anypart of the device except where intended, to wit, the lens. rlhis i5accomplished-by the co-operation of member 3 with member 5, that is,through the overlapping of members 8 and 5. This is a very importantfeature, as it eliminates all the objectionable defects possessed bynose and throat lamps now -used by the medical profession. VMy deviceprevents 'the escape of light, thereby doing away flections that alwaysaccompany the `use of the open lights of the prior art, andso regu latesit that it maybe entirely directedlto the place needed.v `For this styleof lamp the tubular section 16 could be shortened and made toaccommodate a glass or lens of yany desired type.

l do not, therefore, limit myself 'to the exact construction shown, asvarious changes may be made therein without departing y from the spiritof my invention or the scope of the claims appended hereto. f y.

lVhat I claim as new and desire to secure by Letters Patent, is:

1. A device of the having a stationary reflector vwhich is substantiallyhemispherical, and twov substan tially hemispherical members havingmeans for respectively attaching thereto light-diffusing material andlenses, 'said two members being spaced from each other and from thereflector and overlapping the latter and adapted to separately rotatethereover, and a light source. positioned in front of thereiiector,substantially as described.

2. A device of the character vdescribed having vthree substantiallylieinispherical members spaced from each other, one of said membersbeing a opening in its wall for v'fastening' therein a light source, theother two members being independently rotatable over said refiector,

.one of them being equipped. with light diffusing material and the otherhaving a tubular extension in which lenses are mounted, substantially asdescribed. j Y

3. A device of the character described having` three substantiallyhemispherical members spaced from each other,roneof said members beingstationary and acting as a reflector, a light source positioned in.front of the said stationaryk refiector member, the other two of saidmembers overlapping said character described reflector and having anvstationary member and adaptedv to separately rotate -thereover, onebeingvequipped with light diffusing material and thel other having atubular extension in which lenses are mounted, lsubstantially asdescribed.v

4f. A device of the character described having three substantially.helnispherical members spaced from each other, one of said membersbeing a reflector and having an opening in its wall or insertion thereinof a light source, the other two members being independently rotatableover said re- Hector, one of them being equipped with light diusingmaterial, a tubular extension in the other, a sleeve in said extension,said sleeve having flanges on each end thereof,

its outer flange engaging the circumference vof the tubular extension, aremovable cap mounted on said extension and a lens held between said capand flange, a removable ring on theinner end of the Sleeve, an ad-v]ustable member on the interior thereof contacting with the saidlnnerflange, and a vsecond lens held between said adjustable ELLIOTT B.MABEE.

